The machete??

I don't know but this maybe based on an ollin sword design for zombies??
You can check for yourself herehttp://ollinsworddesign.com/osd-zombie.html
[IMG]file:///C:/Users/ANDREW%7E1/AppData/Local/Temp/moz-screenshot.jpg[/IMG]

Being a huge geek I wonder where I was when this was originally posted. All those who said it was a Mercworx knife are correct. The both Leon's knife in RE4 and Chris in RE5 are based on Mercworx knives.